<?php
/**
 * crcl/base
 *
 * Copyright 2013 CRCL - André Sabosch - info@crcl.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace crcl\base\filter\container;

interface IQuote
{
}

class ContainerQuote extends Base implements IQuote
{
  public function filter($value)
  {
    if (!\is_numeric($value) && (!\is_null($value)))
    {
      $value = \trim($value);
      $value = \crcl\base\String::getInstance($value)
                 ->doStartWith(self::QUOTE)
                 ->doEndWith(self::QUOTE)
                 ->toString();
    }
    if (\is_null($value))
    {
      $value = 'NULL';
    }
    return $value;
  }


  /** PRIVATE *************************************************************************************/

  const QUOTE = "'";
}